Doctors on the study say EEG may one day become a better way to measure alterations in brain function associated with chemotherapy.

"If indeed a larger study would confirm that EEG measurements were more sensitive to and correlated to individuals who were experiencing more of these issues, then it would suggest that it might be a means we could use to formally study interventions," said Cleveland Clinic Oncologist Dr. Halle Moore.

Dr. moore presented her findings this week at the American Society of Oncology's annual meeting.